The common causes of dry cough without phlegm and itchy throat in adults are acute and chronic pharyngitis and allergic pharyngitis, etc. You can choose medication and life management according to the causes and symptoms. 1. Acute and chronic pharyngolaryngitis: often triggered by excessive use of the voice, spicy stimulation, etc. When the symptoms are mild, you can use watermelon cream tablets to relieve the symptoms; if there are bacterial infections and other causative factors, you can use amoxicillin, cephalexin and other medications to treat the disease, and pay attention to avoid the stimulation of spicy and irritating foods, drink more water. 2. Allergic pharyngolaryngitis: can also lead to the occurrence of the above symptoms, mostly due to pollen, artemisia and dust mites and other allergens stimulation triggered, it is recommended to avoid contact with suspected allergens in a timely manner, the use of cetirizine, chlortetracycline and other antihistamines anti-allergy treatment. In addition, gastroesophageal reflux and other causes of the above symptoms, it is recommended to consult the hospital in a timely manner to clarify the diagnosis, standardize the use of medication and treatment to avoid delays in the condition.